:root {
  --navy-950: #020b1b;
  --navy-900: #06162f;
  --navy-850: #0a1d38;
  --navy-800: #102847;
  --blue: #16a9ef;
  --blue-strong: #087fc4;
  --orange: #ff6b00;
  --white: #ffffff;
  --muted: #9fb0c9;
  --line: rgba(255, 255, 255, 0.11);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--white);
  background:
    radial-gradient(circle at 74% 4%, rgba(22, 169, 239, 0.18), transparent 28rem),
    linear-gradient(180deg, var(--navy-900), var(--navy-950) 72%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(4, 18, 42, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner,
.page-shell,
.footer-inner {
  width: min(1220px, calc(100% - 40px));
  margin-inline: auto;
}

.header-inner {
  min-height: 94px;
  display: flex;
  align-items: center;
  gap: 36px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand img {
  width: 243px;
  max-width: 36vw;
  height: auto;
  display: block;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 26px;
}

.site-nav a {
  color: #fff;
  text-decoration: none;
  font-size: 0.97rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--blue);
}

.menu-toggle {
  display: none;
  margin-left: auto;
  width: 46px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #fff;
  background: var(--navy-800);
  font-size: 1.35rem;
  cursor: pointer;
}

.page-shell {
  padding-block: 44px 76px;
}

.library-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--orange);
  font-size: 0.79rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: clamp(2.1rem, 5vw, 4.3rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.lede {
  max-width: 670px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.library-count {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: #d9e7f7;
  font-weight: 700;
}

.library-count::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 99px;
  background: var(--blue);
  box-shadow: 0 0 0 6px rgba(22, 169, 239, 0.13);
}

.watch-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.62fr) minmax(330px, 0.78fr);
  gap: 24px;
  align-items: start;
}

.player-card,
.playlist-panel,
.sales-panel,
.course-outline {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 29, 56, 0.78);
  box-shadow: var(--shadow);
}

.video-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;
  background: #000;
}

.video-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
}

.video-frame video::cue {
  background-color: transparent;
  font-weight: normal;
  text-shadow: none;
}

.subtitle-toggle {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 4;
  min-width: 70px;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  color: #fff;
  background: rgba(2, 11, 27, 0.84);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.subtitle-toggle:hover,
.subtitle-toggle:focus-visible {
  border-color: var(--blue);
  background: var(--blue-strong);
}

.subtitle-toggle:disabled {
  opacity: 0.72;
  cursor: not-allowed;
}

.now-playing {
  display: flex;
  align-items: center;
  gap: 10px;
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  margin: 0;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: #fff;
  background: rgba(2, 11, 27, 0.78);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
}

.now-playing span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
}

.player-copy {
  padding: 26px 28px 28px;
}

.player-copy h2 {
  margin-bottom: 8px;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.15;
}

.player-copy p {
  margin-bottom: 0;
  color: var(--muted);
}

.playlist-panel {
  overflow: hidden;
}

.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}

.panel-title h2 {
  margin: 0;
  font-size: 1.12rem;
}

.panel-title span {
  color: var(--muted);
  font-size: 0.83rem;
}

.playlist {
  display: grid;
  max-height: 500px;
  overflow-y: auto;
  scrollbar-color: var(--blue-strong) var(--navy-900);
}

.playlist-item {
  width: 100%;
  display: grid;
  grid-template-columns: 38px 96px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: #fff;
  text-align: left;
  text-decoration: none;
  background: transparent;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}

.playlist-item:hover,
.playlist-item:focus-visible {
  background: rgba(22, 169, 239, 0.09);
}

.playlist-item[aria-current="true"] {
  background: linear-gradient(90deg, rgba(22, 169, 239, 0.2), rgba(22, 169, 239, 0.05));
  box-shadow: inset 3px 0 0 var(--blue);
}

.track-number {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.playlist-item[aria-current="true"] .track-number {
  color: var(--navy-950);
  border-color: var(--blue);
  background: var(--blue);
}

.track-thumb {
  width: 96px;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border-radius: 7px;
  background: var(--navy-950);
}

.track-copy {
  min-width: 0;
}

.track-copy strong,
.track-copy small {
  display: block;
}

.track-copy strong {
  font-size: 0.92rem;
  line-height: 1.25;
  white-space: normal;
}

.track-copy small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.75rem;
}

.price-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin: 8px 0 22px;
}

.price {
  font-size: 2.1rem;
  font-weight: 850;
  letter-spacing: -0.04em;
}

.price-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 21px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--orange);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #ff7c1a;
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--blue);
  background: rgba(22, 169, 239, 0.12);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #020a19;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 40px;
  padding-block: 42px;
  color: var(--muted);
}

.footer-inner strong {
  color: #fff;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 24px;
}

.footer-links a {
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--blue);
}

/* Sales page */
.sales-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  align-items: center;
  gap: clamp(34px, 6vw, 80px);
  min-height: 580px;
  padding-block: 26px 54px;
}

.sales-hero h1 {
  max-width: 780px;
  margin-bottom: 18px;
}

.sales-hero .lede {
  margin-bottom: 26px;
  font-size: 1.12rem;
}

.benefit-list {
  display: grid;
  gap: 11px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
}

.benefit-list li {
  position: relative;
  padding-left: 30px;
  color: #d8e4f2;
}

.benefit-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 900;
}

.sales-panel {
  align-self: start;
  overflow: hidden;
  background: linear-gradient(180deg, #102c51, #081a34);
}

.sales-panel img {
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  display: block;
  aspect-ratio: auto !important;
  object-fit: contain !important;
  object-position: center !important;
}

.sales-panel-copy {
  padding: 28px;
}

.sales-panel .price {
  display: block;
  margin-bottom: 2px;
  font-size: 2.7rem;
}

.sales-panel .button {
  width: 100%;
  margin-top: 20px;
}

.microcopy {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

.course-outline {
  padding: clamp(28px, 5vw, 58px);
}

.course-outline h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.035em;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.module {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
}

.module span {
  color: var(--orange);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.module h3 {
  margin: 10px 0 8px;
  font-size: 1.15rem;
}

.module p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  transform: translateY(-150%);
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--navy-950);
  background: #fff;
  font-weight: 800;
}

.skip-link:focus {
  transform: none;
}

:focus-visible {
  outline: 3px solid rgba(22, 169, 239, 0.7);
  outline-offset: 3px;
}

@media (max-width: 980px) {
  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    display: none;
    position: absolute;
    inset: 94px 20px auto;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #071a35;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-nav a {
    padding: 8px 4px;
  }

  .watch-layout,
  .sales-hero {
    grid-template-columns: 1fr;
  }

  .playlist {
    max-height: none;
  }

  .module-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 650px) {
  .header-inner,
  .page-shell,
  .footer-inner {
    width: min(100% - 28px, 1220px);
  }

  .header-inner {
    min-height: 78px;
  }

  .brand img {
    max-width: 190px;
  }

  .site-nav {
    inset: 78px 14px auto;
    grid-template-columns: 1fr !important;
  }

  .page-shell {
    padding-block: 30px 54px;
  }

  .library-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .player-copy,
  .sales-panel-copy {
    padding: 22px;
  }

  .playlist-item {
    grid-template-columns: 34px 78px minmax(0, 1fr);
    gap: 10px;
    padding-inline: 12px;
  }

  .track-thumb {
    width: 78px;
  }

  .sales-hero {
    min-height: 0;
  }

  .module-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}